Book Image

Mastering Python Networking - Third Edition

By : Eric Chou
Book Image

Mastering Python Networking - Third Edition

By: Eric Chou

Overview of this book

Networks in your infrastructure set the foundation for how your application can be deployed, maintained, and serviced. Python is the ideal language for network engineers to explore tools that were previously available to systems engineers and application developers. In Mastering Python Networking, Third edition, you’ll embark on a Python-based journey to transition from traditional network engineers to network developers ready for the next-generation of networks. This new edition is completely revised and updated to work with Python 3. In addition to new chapters on network data analysis with ELK stack (Elasticsearch, Logstash, Kibana, and Beats) and Azure Cloud Networking, it includes updates on using newer libraries such as pyATS and Nornir, as well as Ansible 2.8. Each chapter is updated with the latest libraries with working examples to ensure compatibility and understanding of the concepts. Starting with a basic overview of Python, the book teaches you how it can interact with both legacy and API-enabled network devices. You will learn to leverage high-level Python packages and frameworks to perform network automation tasks, monitoring, management, and enhanced network security followed by Azure and AWS Cloud networking. Finally, you will use Jenkins for continuous integration as well as testing tools to verify your network.
Table of Contents (18 chapters)
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Authentication and authorization

For basic user authentication, we will use Flask's httpauth extension, written by Miguel Grinberg, as well as the password functions in Werkzeug. The httpauth extension should have been installed as part of the requirements.txt installation at the beginning of this chapter. The new file illustrating the security feature is named In the script, we will start with a few more module imports:

from import generate_password_hash, check_password_hash
from flask_httpauth import HTTPBasicAuth

We will create an HTTPBasicAuth object as well as the user database object. Note that, during the user creation process, we will pass the password value; however, we are only storing password_hash instead of the cleartext password itself:

auth = HTTPBasicAuth()
class User(db.Model):
    __tablename__ = 'users'
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db...